Thanks for the useful help.
The main problem would not be in the Config2G.bld. The modification would not cause this error.
According to the document "TI81XX PSP VPSS Video Driver User Guide", the reason causing the problem may be in the PSP, such as kernel for wrong base address or wrong mem= configuration，as you said.
The error would be raised in transferring the demo to our boards. Our development takes too long, most of our codes transferred to DVR_RDK4.0, except display drivers and linux Kernal. Especially, our linux kernal comes from DVR_RDK3.0, and many drivers are modified.
the document "TI81XX PSP VPSS Video Driver User Guide" says:"The addresses of notifyk.vpssm3_sva and vpss.sbufaddr mentioned in this userguide apply only to the M3 firmware inside PSP package"
I modified the uboot entry point and load address. Do notifyk.vpssm3_sva and vpss.sbufaddr need to modified, and others need to be rebuilt? and how could I do? Moreover, when I execute "./slaveloader startup VPSS-M3 ti816x_hdvpss.xem3", I didn't find the file VPSS-M3 ti816x_hdvpss.xem3.